Light for its output, no clear weak spot
The JT SPt(B) series consists of dual-glass monocrystalline modules built on N-type TOPCon cells with a multi-busbar grid, designed for installations that demand maximum energy yield within a limited mounting area. The defining feature of this series is its bifacial technology, which captures light reflected from the ground surface and delivers a real gain in energy production compared to conventional single-sided panels, directly lowering the levelized cost of electricity (LCOE). The N-type cell architecture reduces LID/LETID degradation and PID risk, allowing the modules to maintain stable output throughout their operating life. The tempered dual-glass construction boosts mechanical durability - the panels withstand heavy snow and wind loads as well as hail impact, making them a solid choice for installations in more demanding climates. Every module undergoes double electroluminescence (EL) inspection, minimizing the risk of microcracks and manufacturing defects. The JT SPt(B) series works well for both rooftop installations and larger ground-mounted projects, where long-term reliability and a predictable power output curve, backed by an extended manufacturer warranty, matter most.
Ranking
Signals from the data
Utility-scale, commercial and cold-climate.
Top 21% of the TOPCon 700-750 W segment, against a median of 52.9.
Top 25% of the TOPCon 700-750 W segment, against a median of 23.00%.
The bifacial design combined with N-type TOPCon cells captures reflected light from the ground surface, boosting real-world energy yield versus classic monofacial modules. Efficiency up to 23.8% places the series on par with top peer comparables such as Sharp GSD8K66H (23.82%) and JA Solar JAM66D46 LB (23.8%).
The manufacturer covers the series with a 30-year power warranty, a premium standard exceeding the typical 25-year coverage of older PERC technology. Low LID/LETID degradation typical of N-type cells supports a more stable power decline curve over time.
Tempered double glass improves mechanical resistance against snow loads, wind, and hail impact, making the module a solid choice for installations in harsher climate conditions, both on rooftops and ground-mount projects.
Every module undergoes two EL inspections, reducing the risk of microcracks and manufacturing defects reaching the final installation - important for the series' long-term reliability.
Jetion Solar has operated since 2004 and appears on the BNEF Tier 1 list of PV module manufacturers, confirming project bankability and easing financing for installations using this series.
The JT SPt(B) series (launched in 2020) has been discontinued by the manufacturer. This means limited market availability, and potential difficulties with warranty service or sourcing identical modules when expanding an existing installation.
Variants closer to 710 Wp reach only 22.9% efficiency, below top peer comparables such as Sharp GSD8K66H (23.82%) or Tongwei TNC/THC (23.8%) offered at the same 740 Wp maximum power - the specific variant should be checked carefully when selecting modules.
The 12-year product warranty is notably shorter than the 30-year power warranty, which is typical for the segment, though some Tier-1 competitors now offer a standard 15-year product warranty on comparable specs.
- At 23.2% efficiency, this panel is on par with typical TOPCon 700-750W modules
- Power density of 231.8 W/m² matches the TOPCon 700-750W median
- At -0.29%/°C, hot weather performance is typical for TOPCon 700-750W panels
- Weight of 36.7 kg (1.3 kg below TOPCon 700-750W median of 38.0 kg) allows easier transport and roof mounting
- Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface
Specifications
Datasheet charts
Measured curves published by Jetion in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 720 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
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